// Request
curl https://merlin.blockpi.network/v1/rpc/your-rpc-key -X POST -H "Content-Type: application/json" --data
'{"method":"debug_traceBlockByHash","params":["0x109b778ef3bc180756de7e5278e0367bdb880ceb58b0a50ab375cba29232e4d2", {"tracer": "callTracer"}],"id":1,"jsonrpc":"2.0"}'
// Result
{
"jsonrpc": "2.0",
"id": 1,
"result":{as described above}
}